Perhaps you should try some spelling variations:
phai nhuong » phan thuong, pham thuong, pham chuong
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
toan thanh » tran thanh, hoan thanh, toan thang
doi chieu » doc hieu, doi chi, ho chieu
pha nhung » tham nhung, phan chung, thai nhung
ban than » ban thanh, van thanh, ban hang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - thanh tung ((pha nhung) OR (phai nhuong)) cong ((toan thanh) or (ban than)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh tung ((pha nhung) OR (phai nhuong)) cong ((toan thanh) OR (ban than)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - thanh tung ((pha nhung) OR (phai nhuong)) cong ((toan thanh) or (ban than)) cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh tung ((pha nhung) OR (phai nhuong)) cong ((toan thanh) or (ban than)) cau*.